1840

Overview

The year 1840 sits within the early Victorian and late Industrial Revolution era, a period of accelerating technological change, overseas expansion and social reform. It was marked by concrete acts of empire, practical innovations that touched everyday life and widening cultural exchange as photography and modern communications began to spread.

Politics and conflicts

1840 witnessed important developments in imperial and electoral politics. In what is now New Zealand, the Treaty of Waitangi was signed between many Māori chiefs and representatives of the British Crown, forming a foundation for British governance and long-term debates about sovereignty and rights. In East Asia the First Opium War, which began the previous year, expanded into a larger naval and diplomatic confrontation between Britain and Qing China. Meanwhile, in the United States the presidential election of 1840 produced a significant Whig victory, reflecting shifting party dynamics and popular campaign techniques.

Science, technology and economy

Practical innovations reached public life in new ways. Postal reform in Britain culminated in the introduction of affordable adhesive postage, commonly associated with the Penny Black stamp and the concept of uniform low-rate postage; this made written communication cheaper and more widely used. Photography, developed at the end of the 1830s, began to be practiced more widely by 1840 through daguerreotype and other early techniques, opening new possibilities for visual documentation. Steam power and mechanized manufacturing continued to reshape transport, industry and urban life.

Culture and society

Social movements and cultural currents reflected the tensions of rapid change. Working-class agitation over labor conditions and political representation continued in several countries, while literature, theater and the visual arts responded to both industrial realities and romantic or national themes. The spread of cheaper postage and the beginnings of mass visual media helped accelerate the circulation of ideas, news and images.

Legacy and notable facts

• The Treaty of Waitangi remains a central document in New Zealand’s constitutional history.
• Postal reform and the first adhesive stamps transformed everyday communication and commerce.
• The early 1840s are often seen as a bridge between nineteenth-century revolutions in transport and information and later political upheavals across Europe.